Furnace wall



Dec. 25, 1928..

D. S. JACOBUS FURNACE WALL Filed July 1925 2 Sheets-Sheet 1 Q df vmzvrok ATTORIVEYS Dec. 25, 1928. v 1,696,239

D. S. JACOBUS FURNACE WALL Filed-July 1925 2 sheets-sun. 2

INVENTOR ATTORNEYS.

2 5, v UNITED STATES PATENT OFFICE.

DAVID s. JACOBUS, ortmasnr CITY, ,Nn'wJERsEY, assrenoa, BY MnsNE AssIG'n xENrs, 'ro FULLER LEHIGH COMPANY, a CORPORATION or DELAWARE.

Hummer: want.

" Application filed July 9, 1925. Serial No. 42,367.

I My present invention relates to furnace 7 wall constructions, particularly furnace walls in which the walls are subjected to considerable variation'in heat conditions, so that the several parts shouldbe movable relatively to each other, and moreparticularly walls adapted for use in air-cooling furnaces. l

My invention will be best understood 1" from the following description and the annexed drawings, in which Fig. 1 is a vertical longitudinal section of a steam boiler furnace embodying my-invention; Fig. 2 is an enlargement of a portionof the rear wall-of Fig. 1; Fig. 3 is a section on the' line 3-3 of Fig. 2, and Fig. 4 is a'modificw.

tion of the arrangement shown in Fig. 3.

Like reference characters indicate like parts in the different views. 'In the illustrative embodiment, the furnace chamber '10 is provided with vertically disposed Walls to' form a chamber substantially rectangular in cross-section, the front wall 11 having a combustionair passage. .12 communicating through the openings 13 with thecombustion chamber. Beneath the furnace floor 14 is a passage 15, receiving air from a duct 16 heated by an air heater 17, the air for the air heater bein forced into the air heater by the fan 18. A ove the furnace chamber is a water tube steam boiler of a known form, the waste gases from which pass through the flue 19 to the air heater 17, and from thence "to the. smoke.

85 outlet 20. In the furnaceroof 21 is one or more powdered fuel burners 22 supplied by air from a cross duct 23 connected by a duct 24 to the upper part of the air heater 17, the air for the duct 24 beingtaken from the lower part of the air heater through the fan 25. Air from duct 16 is also supplied to ducts 28 in the rear wall, from whence it flows, in the illustrative arrangement, through horizontal ducts in the side walls into passage 12 and so into the ,furnace chamber through openings 13.' The specific arrangement of the air supply for the furnace is no part of my present invention and further description thereof will be 1mnecessary. This arrangement, however, is

more particularly descrlbediin my copending application Serial No.- 37 ,641, filed-lune 17, 1925. The rear and side furnacewalls', in the illustrative embodiment, are of the 66 same construction and a description of one beams and of them will, therefore, suffice for all of them. 1

As shown in Fig. 1, the rear wall is made up of a plurality of sections, each substantially vertical, but withthe successive high- 60 er sections stepped. rearwardly, so that "the .total effect of the several sections is an outwar'dly inclined wall. Each of the sections is independentlysupported by fixed memg bers extending beneath the sections, and since all of the sections are substantially alike, a description of one of them will be suiiicient. M f i 1 In Fig. 2, I have indicated an inner wall. at 26,'the outer portion of the wall 27 being spaced from the inner wall 26 to form an air passage 28, the inner and the outer parts of the wall being heldin spaced relation in any suitable manner, as by the dividing tile-29.

Beneath the sections extends a pair xof fixed I-beams 30 to carry the weight of the wall, a metallic plate 31 resting on the I- supporting both parts 26, 27 of the wall. The endsof these beams are connected to the usual steel frame work sup"- portingthe boiler and its setting. The in-, ner part 26 of the wall is carried up along? side of the next higher section 26 so as to make a sliding joint between 26 and 26'. In order to maintain the parts 26 and 26" together, I provide one or more courses of special tile 32 in the,part 26 and special tile 33 in the part26', these parts being arranged as shown best in Fig. 3, with interlocking tongue portions. It will be noted that, in the illustrative embodiment, each tile 32 is equal in height to one course of the regular tile in. the wall and tile 33 equal to two courses. When the wall 26 moves Y vertically, the tile 32 will slide over the tile 33 and,a't the same time, the interlocking hooks on the two sets of tile will keep the parts of the wall26 and 26' to ether. A suitable-casing 34 may be provi ed on the" exterior of each section.

The. overlapping of the parts 26 and 26 insures complete protection for the metal parts which support the several sections and, at the same time,-permit the sections" to move relatively to each other as .the wall 105 is subjected to varying heat conditions Such movement may arise from expansion f of the tiling of the wall or the s rin ing of the supporting metal work un er t e, we tions. .By providing'a possible relative ver- 110 tical movement between special tile 32 and 33 equal to the thickness of one of the courses of regular tile in the wall, any possible inaccuracy in the vertical spacingh of the supports for the several sections or t eir not being on the same level throughout their lepfith will not afiect the laying u of the w nor necessitate the cutting of any of the regular tile to roduce a thm course.

The ossible di erence in expansion between t e inner and outer parts of a section will be so small because of the short vertical height of each section, that the tile 29 connecting these parts will not be afiected, which would not be the case if the entire height of the wall were in a single section instead of a number of short sections. With the wall all'in one piece, the relative motion at the upper part of the wall between the inner and outer parts might be sufiicient to rupture tile 29 or incline them at. an angle to the horizontal. By dividing the wall into short sections, as shown, the use of the tile 29 connecting the inner and outer parts is made ossible.

It wi be understood that the arrangement which I have shown is merely illustrative and that the embodiment of my invention may be widely varied.

The arrangement of Fig. 4 is similar to that of Fig. 3, except that fewer of thespecial tile 32 are used and more of the ordinary brick used in building such walls.

I claim 1. A furnace chamber having a wall thereof made up of a plurality of sections arranged in stepped relation, each section comprismg an inner and an outer wall spaced apart to form an .air duct therebetween, a fixed sup ort beneath each section to support both sai inner and said ,outer walls thereof, the inner wall of each section being extended u ward into overlapping sliding engagement w1th the lower part of the inner face of the next higher section.

2. A furnace chamber havin a wall thereof made up of a plurality 0 sections arranged in stepped relation, each section comprising an inner and an outer wall spaced apart to form an air duct therebetween, a metallic plate extending beneath both said inner an said outer walls, a fixed support beneath said plate the inner wall of each section being extended upward into overlappinglsliding engagement with the lower part of t e inner face of the next higher section, and the outer wall of each section terminating below the fixed support of the next hi her section.

A furnace chamber having horizontally dwpowl cooling air passages m a wall thereof, said wall having a plurality of sections, each section having a beam beneath the same and double walls above the beam to form the air passage, the top of an air passage in one section being spaced from the beam of the next higher section and the inner face of one section being extended upward in front of the beam of the next higher section into overlapping sliding engagement with the lower part of the inner face of the next higher section.

4. A furnace chamber having a wall thereof made up of a plurality of sections arranged in stepped relation, each section comprising an inner and an outer wall spaced apart to form an air duct therebetween, a fixed support beneath each section to support both said inner and said outer walls thereof, the inner wall of each section being extended upward into overlapping sliding engagement with the lower part of the inner face of the next higher section, and tile in said overlapgin parts having interengaging portions to 01 said overlapping portions against relative horizontal motion and to permit relative vertical motion therebetween.

5. A furnace chamber having a wall thereof made up of a plurality of sections arranged in stepped relation, each section comprising an inner and an outer wall spaced apart to form an air duct therebetween, a fixed suplport beneath each section to support both sai inner and said outer walls thereof, the inner wall of each section being extended u ward into overlapping sliding engagement with the lower part of the inner face of the next higher section, one of said overlapping parts having tile therein with a relatively thin portion extendin into the other of said overlapping parts an havin a hook engaging with a relatively thick ti e in said other overlappinigr part, whereby said overlapping parts are ee to move relatively vertically and are locked against relative horizontal motion.

6. A furnace chamber havin a wall thereof made up of a plurality 0 sections arranged in steppml relation, each section comprising an inner and an outer wall spaced apart to form an air duct therebetween, a fixed support beneath each section to su port both said inner and said outer wa ls thereof, the inner wall of each section being extended upward into overlapping sliding engagement with the lower part of the inner face of the next higher section, and means to hold said overlapping portions against relative horizontal motion and to permit relative vertical motion'therebetween.

DAVID S; J ACOBUS. 

